Strengths: Lighter than I was expecting and easy to use basic functions
Weaknesses: Haven't found any yet
Overall: Bought mine from Amazon for a good price and have used it just a few times. I've heard that the battey life is not long so I use it once to measure a route and calories then just use only my watch to measure times on the same route thereafter. I did not really know what to expect from the 101 but I am delighted with it.